How Can I Grouping by tags a RadGridView

2 posts, 0 answers
  1. Riccardo
    Riccardo avatar
    1 posts
    Member since:
    Dec 2012

    Posted 11 Feb 2015 Link to this post

    I have this class

    public class myObject
      public String Name { get; set; }
      public List<String> Tags{get;set;}
    this ViewModel
    public class ViewModelMainWindow:ViewModel
      System.ComponentModel.ICollectionView m_myListOfObject;
      public ICollectionView MyListOfObject
        get { return m_myListOfObject; }
        set { m_myListOfObject = value; }
    I initialize my App
    public partial class App : Application
      MainWindow m_ViewMainWindow;
      ViewModelMainWindow m_ViewModelMainWindows;
      List<myObject> m_myListOfObject;
      protected override void OnStartup(StartupEventArgs e)
      void Init()
        m_ViewMainWindow = new MainWindow();
        m_ViewModelMainWindows = new ViewModelMainWindow();
        PropertyGroupDescription groupDescriptionPorte = new PropertyGroupDescription("Tags");
        m_myListOfObject = new List<myObject>();
        m_myListOfObject.Add(new myObject());
        m_myListOfObject.Last().Name = "Element 1";
        m_myListOfObject.Last().Tags = new List<string>();
        m_myListOfObject.Last().Tags.Add("Tag 1");
        m_myListOfObject.Last().Tags.Add("Tag 2");
        m_myListOfObject.Add(new myObject());
        m_myListOfObject.Last().Name = "Element 2";
        m_myListOfObject.Last().Tags = new List<string>();
        m_myListOfObject.Last().Tags.Add("Tag 1");
        m_myListOfObject.Last().Tags.Add("Tag 3");
        m_myListOfObject.Add(new myObject());
        m_myListOfObject.Last().Name = "Element 3";
        m_myListOfObject.Last().Tags = new List<string>();
        m_myListOfObject.Last().Tags.Add("Tag 2");
        m_myListOfObject.Last().Tags.Add("Tag 4");
        m_ViewModelMainWindows.MyListOfObject = CollectionViewSource.GetDefaultView(m_myListOfObject);
        m_ViewMainWindow.DataContext = m_ViewModelMainWindows;

    How can I view the groups by tags "Tag 1", "Tag 2", "Tag 3", "Tag 4" in a RadGridView?
    In m_ViewModelMainWindows.MyListOfObject I have 4 groups, but in RadGridView of MainWindow I have 3 groups of list.

    The MainWindow.xaml is
            xmlns:telerik="" x:Class="grouping_by_tags.MainWindow"
            Title="MainWindow" Height="350" Width="525">
                <RowDefinition Height="137*"/>
                <RowDefinition Height="183*"/>
            <telerik:RadGridView HorizontalAlignment="Left" Height="320" VerticalAlignment="Top" Width="517" ItemsSource="{Binding MyListOfObject}" Grid.RowSpan="2"/>

    Best regards

  2. Stefan
    Stefan avatar
    1073 posts

    Posted 12 Feb 2015 Link to this post

    Hello Riccardo,

    As I get from your code, you are trying to group your objects by a collection property, which is not possible in RadGridView. A way to achieve the desired grouping behavior, is to define a separate property for each "Tag" in the business object.

    In addition, I would recommend you to read our documentation on the RadGridView grouping functionality.

    Best Regards,

    Check out the Telerik Platform - the only platform that combines a rich set of UI tools with powerful cloud services to develop web, hybrid and native mobile apps.

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